Shijiazhuang Steel Manufacturer Tel: ?
Classification of steel production methods
(1) Shijiazhuang Steel manufacturer of the manufacturing process can be divided into: hot rolled (extrusion), cold (pull), thermal expansion of these basic types of steel.
(2) Shijiazhuang steel manufacturers in accordance with the manufacturing process can be divided into: straight seam welded steel pipes, submerged arc welding steel pipes, butt welding pipe coils, pipe thermal expansion pipe.
(3) Shijiazhuang Steel manufacturers can be divided according to the shape of a square steel tubes, rectangular tubes, octagonal, hexagonal, D-shaped, pentagonal shaped steel tubing, etc.. Complex cross-section steel, double concave steel, five plum-shaped pipe, conical steel pipe, corrugated steel pipe, melon-shaped steel tube, pipe double-convex, etc.
(4), according to Shijiazhuang Steel manufacturers use classification - pipes with steel pipes, steel pipe thermal equipment, machinery and steel industry, petroleum, geological drilling steel, container steel, chemical industry with steel pipes, steel tubes for special purposes, other
Shijiazhuang Steel pipe manufacturer to provide fake identification method
1. Shoddy steel prone to collapse.
Folding is a variety of line pipe formed on the surface, this defect often throughout the product vertical. Have collapsed due to shoddy manufacturers to pursue high efficiency, reduction is too large, resulting in the ears, rolling to produce under a folded, folding the product after bending will crack down strength of steel.
2. Ma shoddy steel surface appearance of the phenomenon often.
Ma face is due to a serious cause Corrugated steel abrasion irregular uneven surface defects. Shijiazhuang Steel manufacturers due to the pursuit of profit, most often excessive rolling groove rolling.
3. Steel surface is easy to produce fake scar.
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